Atty. Mark C. Dangerfield
For more than 25 years, Mark has offered intelligent and persistent advocacy for his clients involved in complex litigation matters. In the process, he has helped clients ranging from the State of Arizona to the Arizona Cardinals achieve their objectives, even when doing so required trips to the court of appeals to confirm correct rulings by a trial court or reverse errant ones.
Commercial Litigation Attorney · Serving Phoenix, AZ
Profile Summary
About Mark C. Dangerfield at a Glance
Mark C. Dangerfield is a business and litigation attorney based in Phoenix, Arizona, practicing at Gallagher & Kennedy PA. Admitted to practice in Arizona, State Bar of Arizona. Educated at Harvard University (J.D., 1986) and Brigham Young University (BA, 1975). Recognitions include Best Lawyers in America — Commercial Litigation (2026), Best Lawyers in America — Additional Areas of Practice: (2026), and Best Lawyers in America — Appellate Practice (2026). Serves clients in Phoenix, AZ and the surrounding metropolitan area.
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About Mark C. Dangerfield
For more than 25 years, Mark has offered intelligent and persistent advocacy for his clients involved in complex litigation matters. In the process, he has helped clients ranging from the State of Arizona to the Arizona Cardinals achieve their objectives, even when doing so required trips to the court of appeals to confirm correct rulings by a trial court or reverse errant ones. Mark’s thorough analysis of evidence in complex cases often leads to key connections among facts that aid in the successful resolution of a matter. And clients appreciate that, despite Mark’s focused efforts to prevail, he maintains a steady, sunny demeanor, typically reflected in his ready smile.
Mark’s legal skills have also benefited from his other life experiences. After completing a degree in classical Greek language and literature from Brigham Young University, Mark spent several years working in the construction and real estate industries. He then went to law school, receiving his J.D. from the Harvard Law School in 1986. Clients often praise the quality of Mark’s written legal work, and he believes both his classical language training and his time at Harvard Law have enhanced that skill. Mark has since assisted clients in a variety of cases, including those involving real estate, legal and accounting malpractice, contract disputes, corporate governance, securities, and statutory issues.
Mark has also developed special expertise and experience in appellate advocacy. He has handled many appeals, not only before Arizona courts, but also in matters pending before the United States Courts of Appeal for the Fourth, Fifth, Eighth, Ninth, and Tenth Circuits.
Mark’s legal prowess was exemplified in his work as the principal lawyer defending the State of Arizona from lawsuits arising from the alternative fuel legislation enacted in 2000. That required Mark to defend against two major class actions and approximately a dozen other lawsuits stemming from that legislation. The State prevailed completely in every case, including four cases that required decisions by the Arizona Court of Appeals, two of which are reported at Moulton v. Napolitano, 205 Ariz. 506, 73 P.3d 637 (App. 2003) and Baker v. Ariz. Dep’t of Rev., 209 Ariz. 561, 105 P.3d 1180 (App. 2005). But Mark also represents individual clients. In Murphy Farrell Development v. Sourant, 229 Ariz. 124 (App. 2012), for example, Mark successfully defended an individual in an action seeking to acquire mining rights from his client, based on allegations that the client had improperly acquired them. After a trial, the court ruled in favor of Mark’s client on the issue, but denied the client’s request for an award of attorney’s fees. Later, the Arizona Court of Appeals not only agreed that Mark’s client properly acquired the mining rights, but found the trial court had erred in not awarding fees.
Representative Experience
- Assisting a team of lawyers representing Brigham Young University in a lawsuit against Pfizer, Inc. regarding B.Y.U.’s involvement in the development of the blockbuster arthritis drug, Celebrex. The case received national attention and was amicably settled in 2012. See, e.g. 5/1/12 New York Times article, “Pfizer Settles B.Y.U. Lawsuit Over Development of Celebrex.”
- Successfully defending the Arizona Cardinals in a suit seeking to enjoin the team from enforcing certain rights and restrictions the Cardinals claimed in a public street adjoining University of Phoenix stadium in Glendale. After the trial court issued a preliminary injunction against the team, Mark filed an appeal to the Arizona Court of Appeals, which vacated the injunction. City of Glendale v. B&B Holdings, Inc., 1 CA-CV 07-230 (April 24, 2008) (Memorandum Decision). The parties then reached a settlement on the remaining issues.
- Successfully defending a national homebuilder in a class action construction defect lawsuit seeking millions in damages for homes built in a Chandler, Arizona subdivision. Prior to trial, the judge dismissed the class action allegations as well as the claims against many of the individual homes. On the remaining homes, the jury returned only a nominal verdict that was less than the client’s own expert had recommended.
- Assisting Arizona’s Independent Redistricting Commission in reversing a judgment that had invalidated the Commission’s decennial redistricting plan as unconstitutional. Mr. Dangerfield represented a group of individuals who intervened in the case, and filed a brief in the Court of Appeals supporting the Commission’s plan. The Arizona Court of Appeals reversed the trial court’s decision. See Arizona Minority Coalition for Fair Redistricting v. Arizona Independent Redistricting Com’n, 211 Ariz. 337, 121 P.3d 843 (App. 2005).
- Representing an owner of valuable real estate situated near an Arizona freeway in a lawsuit brought by a would-be purchaser who, after failing to comply with the terms of purchase, sued and asked the court to force the sale of the property. The court awarded summary judgment in favor of the owner.
- Successfully defending two Arizona congressmen against a lawsuit claiming that their campaign finance practices violated constitutional restraints. After the district court dismissed the claim, Mr. Dangerfield successfully defended the decision before the U.S. Court of Appeals for the Ninth Circuit.
- Representing a publicly-traded technology company based in Arizona in a lawsuit against its outside auditor (then a “Big-Five” accounting firm) and some former officers. The suit resulted in a favorable confidential settlement.
- Obtaining a favorable settlement for investors who had exchanged their stock in a private Arizona bakery for stock in an Oklahoma-based public company. That case required Mr. Dangerfield to bring a successful appeal to the U.S. Court of Appeals for the Tenth Circuit to reverse an initial order of the district court. See Realmonte v. Reeves, 169 F.3d 1280 (10th Cir. 1999).
- Successfully defending a Texas lawyer in a malpractice suit brought by the subsidiary of a national pension fund. After obtaining summary judgment for the lawyer, Mr. Dangerfield successfully defended the subsequent appeal to the U. S. Court of Appeals for the Fifth Circuit. See SMWNPF Holdings DeVore, 165 F.3d 360 (5th Cir. 1999).
- Representing a company in a dispute with two former partners over the sale proceeds from hotels in Minnesota and Iowa. The case went to trial and resulted in a substantial favorable judgment. Mr. Dangerfield successfully defended the judgment on appeal to the U. S. Court of Appeals for the Eighth Circuit. See Larken, Inc. v. Wray, 180 F.3d 729 (8th Cir. 1999).
Practice Areas Explained
Mark C. Dangerfield's Areas of Legal Practice
Each practice area below reflects the types of cases Mark C. Dangerfield handles, with a practical overview of what that area of law involves and how it may apply to your situation in Phoenix.
Business & Corporate Law in Phoenix
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
Mark C. Dangerfield is one of 497,491 business attorneys indexed nationally. Browse business attorneys in Arizona →
Civil Litigation in Phoenix
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Mark C. Dangerfield is one of 450,750 litigation attorneys indexed nationally. Browse litigation attorneys in Arizona →
Jurisdictional Context
Why Local Counsel Matters in Phoenix
Practicing law in Arizona. Legal matters in Arizona are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Phoenix are typically filed in the local municipal court or the appropriate Arizona state district court, depending on subject matter and amount in controversy. An attorney licensed in Arizona brings working knowledge of local procedural deadlines, judicial practices in this venue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Arizona courts without local counsel or pro hac vice admission.
Phoenix Courts and Legal Process
Choosing a Phoenix-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.
Looking for additional Arizona attorneys? Browse all attorneys in Phoenix or all attorneys in Arizona.
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Professional Profile
Why Clients in Phoenix Choose Mark C. Dangerfield
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Mark C. Dangerfield's practice in the field of business and litigation.
Broad Practice Area Coverage
Covering business and litigation, Mark C. Dangerfield can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in Phoenix
A Phoenix-based practice means Mark C. Dangerfield attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
Case Types
Common Legal Issues Mark C. Dangerfield Handles in Phoenix
Below is a representative sample of the types of matters Mark C. Dangerfield has experience with under Arizona law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.
This list is illustrative, not exhaustive. Contact Mark C. Dangerfield directly to discuss the specifics of your situation.
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